Contingencies and commitments (Details)		1 Months Ended	6 Months Ended
	May 02, 2017 response_filed_to_opposition	Jun. 30, 2017 lawsuit	Jun. 30, 2017 lawsuit
Patent Disputes, European Region [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Responses Filed to Oppositions | response_filed_to_opposition	5
Sensipar (cinacalcet) Patent Litigation [Member]
Loss Contingencies [Line Items]
Gain Contingency, Number of Lawsuits Filed		4	13
KYPROLIS (carfilzomib) Patent Litigation [Member]
Loss Contingencies [Line Items]
Gain Contingency, Number of Lawsuits Filed			10